Controller for indicating systems.



A. ZEISEL.

CONTROILLERVFOR INDICATING SYSTEMS. APPLICATION FILEDr FEB. 1, 191s.

Patented May1,1917.

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wventoz A.'ZEISEL.

CONTROL-LER FOR INDICATING SYSTEMS. APPLICATION FILED FEB. 1. 1916.

11,224,827. Patented May -1, 1917.

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4/ i Si 64- 55 WWW/V600 40 UNITED sTATns PATENT OFFICE.

ADOLPH ZEISEL, OF BEL AIR, MARYLAND, ASSGNOR T0 ZEISEL ELECTRIC C0., 0F BEL AIR, MARYLAND, A CORPORATION OF MARYLAND.

CONTROLLER FOB, NDCATING SYSTEMS.

Specification or" Letters Eatent.

Patented May 1, 1917.

Application led February 1, 1916. Serial No. 75,608.

To all whom t may concern:

Be it known that LADOLPH ZEISEL, a citizen of Austria, residing at Bel Air, in the county 0f Harford and State of Maryland, have invented certain new and `useful lmprovements in Controllers for `ltndicating Systems, of which the following is a speciiication.

This invention relates to controllers for indicating systems, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An object of the invention is to provide a controller by means of which indications can be given manually through the movements of the handle to various positions depending` upon the indication desired to be given.

A further object of my invention is to provide a device which is comparatively simple in structure, bymeans of which the current supplied to the indicator may be cut olf under normal conditions, thus minimizing current consumption, and also preventing heating ofthe indicator.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which: i

Figure 1 is a face view of the device;

Fig. 2 is a vertical sectional view, and

Fig. 3 is a diagrammatic drawing showing the use of the controller in an indicating system.

In carrying out my invention l provide a casing 33, which is provided at its top with slots that retain indicating cards 34.

Mounted within the casing is a panel 35 of insulating material that supports the contacts36 and arcuate metallic strip 37, the former being terminals for the units 38 of the resistance coil 39 while the latter is electrically connected to one pole of a battery 40, see Fig. 3, by means of the conductor 31.

Rotatably mounted in the casing is a shaft 41 actuated by a handle 42 that is provided with a pointer 43working over the cards 34.

This shaft has secured thereto, by means of the screws 44 and insulation46, an arm 47 supporting screws 48 and 49 that respectively support the metallic contact 49a,

for the purpose of bridging the strip 37 and contacts 36 and cutting out units of the resistance coil 39.

The arm 47 is formed with a tubular eX- tension 50 in which is mounted a springpressed plunger 5l that supports a roller 52 coperating with notches 53 in an arcuate shape bar 54, this construction holding said handle in any of its adjusted positions.

A dash pot 55 has its piston` stem 56 formed at an intermediate point with a slot 57 that receives a pin 58 projecting from the handle at a point to one side of the axis of the shaft 41.

Beyond this slot the stem is supported by a post 59. The casing of the dash pot is provided with an extension 60 having an extension pin 61, which slides through a post 62 and springs 63, the purpose of which 'is to hold the dash pot and the spring strip 64 in central position between contacts of a `switch 65, adapted to bridge a break in a conductor 66 that has its terminals connected to the poles of the battery 40, and which has arranged in it a signal 67.

lin view of the fact that the resistance coil 68 has its central point connected to one pole of the battery by means of the conductor 30 and the other pole of the battery connected to the strip 37 by means of the conductor 31', any movement of the handle 42 from neutral position will cause a potential to be created at the points 69 and 70 where the coils 39 and 68 are connected together and to which the terminals of a conductor 71 including an indicator 72 is connected in accordance with the well known Wheatstones bridge principle. This difference of potential at the points 69 and 70 causes current to How through the indicator for the purpose heretofore set forth.

rThis type f controller is designed for marine use, such as engine telegraph or for transmitting purposes, where both audible and visible signals should be given at the same moment.

rlthe visible signal is given or transmitted through the unbalancing of the components of the circuits, the audible signal through a bell connected in the circuit separate from the balanced circuits, and lactuated through the movement of handle Y42 and the dash pot 55.

For example, suppose we move the handle 42 to the right one point, or as is the case in the marine telegraph form, Stop to i Stand by position. The pin 58 will move the stem 56 of the dash pot piston toward the right handl flange of the dash pot cylinder, thus compressing the air with which the cylinder is lfilled. Because of the movable construction of the dash pot cylinder, the cylinder will follow the movement of the handle, thus closing the contact between the strip 64 and the stationary switch 65, and by closing this contact it will cause an audible signal to be given at a distant point.

The springs 63 will slowly overbalance the air pressure in the cylinder through leakage of air around the piston and pull the same back to central or balanced position, at the same time breaking contact at strip 64 and switch 65, thus setting the audible signal partv for another operation. As the pin 58 has a comparatively short arc to travel, the amount of movement of the dash f pot piston is small, and allows the instrument to operate either between two adjacent contacts or over the whole scale with the same amount of accuracy.

What I claim is 1. The combination of a controller of the class described comprising a resistant element, a handle movable over said lelement with a circuit closer comprising a slidable dash pot for retarding movement of said circuit closer and a switch operated by saidr dash pot upon movement thereof, one element of said switch being rigidly secured to j said dash pot, and resilient means for normally holding said dash pot in position to open said switch.

2. The combination of a controller of the classy described comprising a resistant element, a handle movable over `said element with a circuit closer comprising a slidable dash pot for retarding movement of said circuit closer and a switch operated by said dash pot upon movement thereof, one element of said switch being rigidly secured to said dash pot, and resilient means for normally holding said dash pot in position to open said switch, said dash pot having a pin and slot connection with said handle.

3. The combination of a controller of the class described comprising a resistant element, a'handle fmovable over said element with a circuit closer comprising a slidable dash pot for retarding movement of said circuit closer and a switch operated by said dash pot upon movement thereof, one ele ment of said switch being rigidly secured to said dash pot, and resilient 'means for normally holding said dash pot in position to open said switch, said dash pot havinga pin and slot connection with said handle, and a notch segment engaging resilient means upon said handle for holding the dash pot i in adjusted position.

In testimony whereof I aflix my signature.

ADOLPH ZEISEL. 

